It looks like that ICS update that rolled out last week to the Nexus S isn’t all that it’s cracked up to be. Google has reportedly put the brakes on the OTA update in a number of regions in order to monitor feedback. In other words, the software is buggy, people are having problems, and Google wants to look into it.

Though some Nexus S owners report having a smooth experience with the Ice Cream Sandwich update, others haven’t been so lucky. Unusual battery drain and weak wireless signals have been the primary culprits.

While Google says that it has pressed the pause button on the update, some users aren’t seeing that; they have reported that they are still seeing the notification for the update, but that it fails at the end of the installation process. If you see the software update notice on your Nexus S, you might want to see the process through to the end before getting too excited.

It isn’t clear how long it will be before Google resumes the update, but the pause has apparently only been a regional thing. Google Community Manager Paul Wilcox said that Ice Cream Sandwich continues to roll out globally, with select regions seeing the update pulled. Users will see the update notification reappear when it’s available again in the effected regions.

How did Google let a buggy update slip through the cracks? Even the most rigorous testing can miss some bugs. A hundred Google employees testing an update in Northern California is one thing; thousands of Nexus S owners using the update all over the world is another. These things will happen; as an Android user, the best you can hope for is that Google jumps on the issue and takes care of it. By all appearance, that’s just what the company is doing.